Lathing



Jan. 9,1923. 1,442,029. l. F. PHILLIPS.

LATHING.

FILED 1uLY-a,192o.

..7 @az 2225/2, wg

MW ma Patented Jan. 9, 1923.

UNITED STATES 1,442,029 PATENT OFFICE.

JOHN `FRANCIS PHILLIPS, OF SPOKANE, WASHINGTON, ASSIGNOR, BY MESNEASSIGN- MENTS, OF vFOIEt'It'llIVE ONE-HUNDREDTHS TO CHARLES P. OUDIN',OF SPOKANE,

YVASHINGTON. l

LATHING.

Application filed July 8, 1920. Serial No. 394,749.

To all whom/t may concer/rb.'

Be it known' that I, JOHN FRANCIS kan; Lire, a citizen of the UnitedStates, residing at Spokane, in the county or' Spokane and State ofllashington, have invented certain new and useiul improvements inLathing` et which the following is a specilication. rlhis inventionrelates to improvements in building' material and more especially to animproved lath.

My improved material is provided with keyfholes of an improved typewhich Jfunction with great advantage to retain the plaster or othermaterial at that critical time just previous to hardening when theplaster otherwise has a tendency to fall away from the surface to whichit is applied, these holes being ci such a novel formation as to shapethe keys -formed thereby in a manner to cause these keys to performtheir function with the least possible waste, and to take such form thatthey will function in the most eilective manner.

My invention has many other features and objects which will be morefully described in connection with the accompanying drawing and whichwill be more particularly pointed out in and by the appended claims.

In the drawing Figure l, is a face View of the studding against which myimproved building ma terial is applied, and before the plaster is puton. l v

Figure 2, is an enlarged sectional view on line 2--2 oi Figure l,showing one view of a key. .A

Figure 3, is an inside view of the key looking in the direction of thearrow of Figure 2.

Like characters of reference designate similar views 'throughout thedifferent gures et the drawing'.

As illustrated, the invention is shown in the form of lathing applied tostudding l.

' My improved lathing is preferably formed ot paper or like brousmaterial in sheet form. rllhe paper is eut in units of sheetstrip form,as indicated at 2, oi' a convenient width and length to facilitatehandling, and the units are applied to the studding with their lateraland end edges in abutting rei lation to Yform a complete and continuousfacing for the` studding thereby greatly adding te the warmth oi thebuilding. Before the paper is ready lor use, it is stifiened andstrengthened by being corrugated, as indicated at 3, and l dispose theco-rrugations, in the preferred form, in such a manner that they willextend horizontally. Thus, the plurality of ribs and hollows or hillsand 'vales ot' the corrugations will afford the plaster a series ofsupporting surfaces when the plaster is first applied, which is thecritical time, just. prior to setting, when such support is most desiredand effective. It is not important whether the corrugations of theabutting strips register at the end portions ofthe strips. In fact, theends of the strips will, in practice, probably not actually abut inendwise engagement, and they are shown in very slightly spaced relation.The usual shingle nails may be employed to fasten the material, as shownat 4, the nails being driven into the studding.

Either before or after the strips are corrugated, itbeing immaterial tothis invention, key holes 5, are formed in the strips. These key holesare of novel formation and are shown to be of half-moon form, thestraight edge portions 6, thereof, not only being horizontally disposedbut uppermost with respect to the lower arcuate margins 7. These holesare interrupted by a bar 8, which is a part of the material not cut-awayand which in fact divides the key hole into two openings 9 and l0. Thelower edge 11, likewise forms a cutting or shearing edge after themanner of edge 6. This will result, irrespective of whether the bar 8,or the edge 6, comes at the crown or the hollow of the corrugations, asillustrated in Figure 2. Thus, the plaster will, in the upward stroke ofthe implement, be forced through opening 10, and subsequently throughopening 9, the latter portion of plaster lobbing down about the bar S,as shown at 12, and joining the lower projecting plaster 13, the twoforming a key which extends about the bar 8, which may thus be termed alocking bar, because the key is locked t0 Said bar when the plasterdries. Further, while l obtain a most efective key, l avoid waste' ofthe plaster as would be 'the case il a single large opening or key holewere provided. By means of this construction, a suflicient amount ofplaster passes or projects through the key hole to form an effective keyand yet I avoid an eX- cess which might drop as it does from betweenwood lath, such droppings being a total waste. Further, l get a strongerkey,

with less plaster than heretofore by reason of the bar lock, theplaster, in forming the key, actually uniting with the lathing. With asingle opening, the plaster forming the key, if suiicient, is Whollydependent on the size of the key and therefore on the amount of plasteror cross section of the key, whereas, with a minimum. of plaster. inthis construction, a key of the strongest possible type is formed. ltmay be considered that the openings 9 and 10 constitute companion andadjacent openings in such juxtaposition that the intervening bar 8,`causes the plaster to form united keys, such openings, in this form,being in line with the plastering stroke.

After the paper has been corrugated and the key holes have beenformedtherein, it is coated, preferably on both sides, with a novelwaterproofing and preserving material having the property of not onlyrendering the paper inaccessible to the moisture of the plaster, andthereby protecting the paper from resulting' rot, but also stiifeningthe paper and lending to it a rigidity suppleinenting the stiffeningaction imparted by the corrugations, thereby enabling me to use a'lighter weight paper than 'would otherwise be possible. In practice, Ihave found that commercial tar, such as is commonly used on buildingmaterial, not only performs all the foregoing functions, but inaddition, greatly extends the life of the lathing. By applying the tarafter the material has been cut to size, corrugated and formed with keyholes, all the exposed edges are'coated with tar, and thus the mostcomplete protection of all `parts is afforded. .lt may also be statedthat whatever weakening effect the key holes cause, is more than made upand ofl'set by the added strength imp-arted by the coating 0f tar. Thisfact is emphasized by reason of the relatively small openings necessarybecause of the locking bar interposed therebetween.

ln order to present a most effective adhering surface to the plaster,the plastering face of the strips, before the tar dries, is spread witha comminuted earthly material, such as relatively fine sand so that whenthe tar dries, the sand will present a rough and abrasive surface totheplaster. This is an important feature, especially when the plaster isfirst put on as it is at this time that it is most important that itshould adhere to the lath.

Now it will be clear that my improved lath is sufficiently inflexible toresist buckling under the thrust of the plastering implement, and thatit Will present a uniform surface to the plaster applied thereto, makinga continuous surface. The strength of the material makes it unnecessaryto provide a double sheet or strip, or a composite lath with anintermediate filling, a single sheet being suiiicient.

By havingr the lath waterproof, the moisture of the plaster is not onlyprevented from entering the lath or travelling toward it, but themoisture is necessarily drawn outwardly through the entire thickness ofthe plaster, by the air, and consequently, the plaster is completely drywhen it does set.

The fact that the plaster is completely dried throughout its thickness,makes the plaster stronger than it otherwise would be. Thus the plastercan never later soak upl any moisture from the lath, which action wouldweaken the plaster. TWhen the moisture is drawn out through thethickness of the plaster, the latter retains all its setting properties.

lt is believed that my invention will be fully understood from theforegoing, and while I have herein shown one form thereof, I do not wishto be limited thereto except for such limitations as the claims mayimport.

Iclaimzfl. A lathing sheet composed of a corrugated paper strip havingcompanion key holes located in corresponding' sides of adj acentcorrugations with a bar therebetween, whereby the plaster' keys formedby said holes will unite with each other about said bar. .f

2. A lathing composed of a corrugated sheet of material having companionkey openings formed in adjacent vales of the corrugations, said openingsinterrupting the hills of said corrugations to form shearing edgeswhereby the plaster will be forced through companion openings and willbond about the intervening portion of the sheet and behind the latter.

3. A corrugated lathing sheet having adjacent superposed key openingslocated in adjacent corrugations and ar locking bar separating saidopenings, each opening having an upper straight edge shearing margin andthe lower opening having a rounded lower margin.

ln testimony whereof l. hereby ai'ix my signature.

JOHN raf/mors r'i-irnrars.

